Discussion: “A General Model for Liquid and Gas Lubrication, Including Cavitation” (Brunetière, N., 2018, ASME J. Tribol., 140(2), p. 021702)

It should be noted that the literature survey in this paper is lacking [1]. The author had neglected to discuss previous work on gas/liquid seals [2], as well as the literature on numerical formulations (in particular the finite element method (FEM)) with upwinding mass conserving algorithms [3]. Ruan et al. [2] included the effects of rough surface contact, and viscous and frictional heating, while Miller and Green [3] included dynamics and transient phenomena. Combining both works [2] and [3], they offered more realistic analyses for face seals operation. Miller and Green [3] also offered a finite volume method that has significant advantages over the FEM: (a) the finite volume method is an explicit formulation (as opposed to an implicit formulation of the FEM), (b) the computational resources needed (memory, etc.) are smaller and execution...